MINIFI-435 - updated httpcomponents versions to match NiFi dependencies

This closes #113.

Signed-off-by: Aldrin Piri <aldrin@apache.org>
diff --git a/pom.xml b/pom.xml
index e46e19e..72437d1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -598,7 +598,7 @@
             <dependency>
                 <groupId>org.apache.httpcomponents</groupId>
                 <artifactId>httpcore</artifactId>
-                <version>4.4.1</version>
+                <version>4.4.4</version>
             </dependency>
             <dependency>
                 <groupId>org.apache.httpcomponents</groupId>
@@ -707,7 +707,7 @@
             <dependency>
                 <groupId>org.apache.httpcomponents</groupId>
                 <artifactId>httpclient</artifactId>
-                <version>4.4.1</version>
+                <version>4.5.3</version>
             </dependency>
             <dependency>
                 <groupId>javax.mail</groupId>